EP0734993A3 - Rotational drive for a swing crane jib - Google Patents

Rotational drive for a swing crane jib Download PDF

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Publication number
EP0734993A3
EP0734993A3 EP96105123A EP96105123A EP0734993A3 EP 0734993 A3 EP0734993 A3 EP 0734993A3 EP 96105123 A EP96105123 A EP 96105123A EP 96105123 A EP96105123 A EP 96105123A EP 0734993 A3 EP0734993 A3 EP 0734993A3
Authority
EP
European Patent Office
Prior art keywords
electric motor
speed
control arrangement
crane
target
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96105123A
Other languages
German (de)
French (fr)
Other versions
EP0734993A2 (en
Inventor
Christoph Dipl.-Ing. Fischer (Fh)
Peter Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAN WOLFFKRAN GMBH
Original Assignee
MAN GHH Logistics GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN GHH Logistics GmbH filed Critical MAN GHH Logistics GmbH
Publication of EP0734993A2 publication Critical patent/EP0734993A2/en
Publication of EP0734993A3 publication Critical patent/EP0734993A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B66C13/30—Circuits for braking, traversing, or slewing motors

Abstract

Für den Drehantrieb eines Auslegers eines Drehkrans, insbesondere eines Turmdrehkrans wird vorgeschlagen, den Elektromotor (1) des Drehantriebs von einer Drehmomentregelanordnung (9) auszuführen und der Drehmomentregelanordnung (9) eine Drehzahlregelanordnung (17) zu unterlagern, die die Führung des Elektromotors (1) von der Drehmomentregelanordnung (9) mit Priorität übernimmt, sobald die Ist-Drehzahl des Elektromotors (1) etwa einer Soll-Drehzahl entspricht. Das Soll-Drehmoment und die Soll-Drehzahl werden manuell an einem Einstellorgan (5) vorgegeben. Die Drehzahlregelanordnung (17) erzeugt im wesentlichen ausschließlich treibende Antriebsdrehmomente. Hierdurch lassen sich trotz einer eventuell schwingfähigen Krankonstruktion Drehschwingungen weitgehend vermeiden und die Drehgeschwindigkeit des Krans auf der an dem Einstellorgan (5) eingestellten Soll-Drehzahl halten. Der Elektromotor (1) wird bevorzugt aus einem Frequenzumrichter (3) mit variabler Frequenz gespeist. Der Frequenzumrichter (3) und der Elektromotor (1) sind für etwa 2/3 der maximal gewünschten Geschwindigkeit bemessen und lassen den Betrieb des Elektromotors (1) im Feldschwächungsbereich zu.

Figure 00000001
For the rotary drive of a jib of a rotary crane, in particular a tower crane, it is proposed to design the electric motor (1) of the rotary drive by a torque control arrangement (9) and to subordinate the torque control arrangement (9) to a speed control arrangement (17) which guides the electric motor (1). by the torque control arrangement (9) with priority as soon as the actual speed of the electric motor (1) corresponds approximately to a target speed. The target torque and the target speed are specified manually on an adjusting element (5). The speed control arrangement (17) essentially generates exclusively driving drive torques. In this way, torsional vibrations can be largely avoided despite a possibly swinging crane construction and the speed of rotation of the crane can be kept at the target speed set on the setting element (5). The electric motor (1) is preferably fed from a frequency converter (3) with a variable frequency. The frequency converter (3) and the electric motor (1) are dimensioned for about 2/3 of the maximum desired speed and allow the operation of the electric motor (1) in the field weakening range.
Figure 00000001
EP96105123A 1995-03-31 1996-03-29 Rotational drive for a swing crane jib Withdrawn EP0734993A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995112253 DE19512253B4 (en) 1995-03-31 1995-03-31 Rotary drive for a slewing boom
DE19512253 1995-03-31

Publications (2)

Publication Number Publication Date
EP0734993A2 EP0734993A2 (en) 1996-10-02
EP0734993A3 true EP0734993A3 (en) 1999-04-14

Family

ID=7758536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96105123A Withdrawn EP0734993A3 (en) 1995-03-31 1996-03-29 Rotational drive for a swing crane jib

Country Status (2)

Country Link
EP (1) EP0734993A3 (en)
DE (1) DE19512253B4 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT409693B (en) * 2001-03-05 2002-10-25 Manfred Dipl Ing Dr Schroedl Electrical drive
DE10314724A1 (en) * 2003-03-31 2004-11-04 Demag Cranes & Components Gmbh Method for reducing the polygon effect in a chain drive, in particular in a chain hoist, and chain drive therefor
US9008919B2 (en) * 2010-07-13 2015-04-14 Volvo Construction Equipment Ab Swing control apparatus and method of construction machinery
US8666613B2 (en) * 2010-12-15 2014-03-04 Volvo Construction Equipment Ab Swing control system for hybrid construction machine
DE102012010760A1 (en) 2012-05-31 2013-12-05 Wolffkran Holding Ag Electrohydraulic device with three-phase asynchronous motor for adjusting a boom
DE102012015306A1 (en) * 2012-07-31 2014-02-06 Control Techniques Ltd. Method for controlling the slewing gear of a slewing crane

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003577A1 (en) * 1978-02-15 1979-08-22 Siemens Aktiengesellschaft Speed control for the slewing and/or lifting gear of a crane
DE3031407A1 (en) * 1979-10-19 1981-04-30 Alfa S.p.A. Costruzioni Metalmeccaniche, Novafeltria, Pesaro e Urbino Gradual continuous tower crane jib rotation control - using motor shaft brake with coil signal derived from potentiometer
FR2520133A1 (en) * 1982-01-19 1983-07-22 Potain Sa EQUIPMENT FOR REDUCING DYNAMIC EFFECTS IN THE ROTATION CONTROL OF A HORIZONTAL ELEMENT OF GREAT INERTIA
DE4038981A1 (en) * 1990-12-06 1992-06-11 Man Ghh Logistics Frequency changer for AC crane motors - uses equivalent circuit data to compute torque and to avoid approaching pull=out torque

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT395273B (en) * 1988-06-13 1992-11-10 Voith Werke DRIVE FOR LIFTS OR THE LIKE.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003577A1 (en) * 1978-02-15 1979-08-22 Siemens Aktiengesellschaft Speed control for the slewing and/or lifting gear of a crane
DE3031407A1 (en) * 1979-10-19 1981-04-30 Alfa S.p.A. Costruzioni Metalmeccaniche, Novafeltria, Pesaro e Urbino Gradual continuous tower crane jib rotation control - using motor shaft brake with coil signal derived from potentiometer
FR2520133A1 (en) * 1982-01-19 1983-07-22 Potain Sa EQUIPMENT FOR REDUCING DYNAMIC EFFECTS IN THE ROTATION CONTROL OF A HORIZONTAL ELEMENT OF GREAT INERTIA
DE4038981A1 (en) * 1990-12-06 1992-06-11 Man Ghh Logistics Frequency changer for AC crane motors - uses equivalent circuit data to compute torque and to avoid approaching pull=out torque

Also Published As

Publication number Publication date
DE19512253A1 (en) 1996-10-02
EP0734993A2 (en) 1996-10-02
DE19512253B4 (en) 2006-05-11

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